of virginia tech is the scene of the worst ever slaughter by a single gunman on a school campus in u.s. history. >> he opened our door and started shooting professor and classmates. >> english major kills 32 and wounds 15 others in two separate attacks. >> and that time we heard the gunshots and we could hear screams. and it was horrible. and then we saw as we police swarm the building. i was calling my friends to tell them wherever they were to stay put. >> two years prior he had been accused of stocking two female students at which time he was ordered to attend anger management. diagnosed with severe anxiety disorder. >> based on that interaction with the counselor. i a temporary detention order was obtained and taken to a medical health facility. >> federal privacy law prevents virginia tech from learning the severity of seung-hui cho's condition. >> as i understand it from our legal counsel even the parents cannot reveal or have that information shared. >> in finland, seven months later another school shooting resulting in a fatality. >> it's very sad that happened. >> the perpetra